x= 1st integer
x+1= 2nd integer
x+2= 3rd integer
x+3= 4th integer
x+4= 5th integer
Add the integers
x + (x+1) + (x+2) + (x+3) + (x+4)= 25
combine like terms
5x + 10= 25
subtract 10 from both sides
5x= 15
divide both sides by 5
x= 3
x+2= 5 third integer
ANSWER: The 3rd integer is 5.
Hope this helps! :)